//The contents of this file are subject to the Mozilla Public License Version 1.1
//(the "License"); you may not use this file except in compliance with the 
//License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
//
//Software distributed under the License is distributed on an "AS IS" basis,
//WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
//for the specific language governing rights and
//limitations under the License.
//
//The Original Code is "The Columba Project"
//
//The Initial Developers of the Original Code are Frederik Dietz and Timo Stich.
//Portions created by Frederik Dietz and Timo Stich are Copyright (C) 2003. 
//
//All Rights Reserved.

package org.columba.core.base;

public class Barrier {

    boolean open;

    public Barrier() {
	this.open = false;
    }

    public synchronized void join() {
	while (!this.open) {
	    try {
		wait();
	    } catch (InterruptedException e) {
		e.printStackTrace();
	    }
	}

	// Wake up the others!
	notifyAll();
    }

    public synchronized void open() {
	this.open = true;
	notifyAll();
    }

    public void close() {
	this.open = false;
    }

}
